NAME

       dlaset.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dlaset (UPLO, M, N, ALPHA, BETA, A, LDA)
           DLASET initializes the off-diagonal elements and the diagonal elements of a matrix to
           given values.

Function/Subroutine Documentation

   subroutine dlaset (characterUPLO, integerM, integerN, double precisionALPHA, double
       precisionBETA, double precision, dimension( lda, * )A, integerLDA)
       DLASET initializes the off-diagonal elements and the diagonal elements of a matrix to
       given values.

       Purpose:

            DLASET initializes an m-by-n matrix A to BETA on the diagonal and
            ALPHA on the offdiagonals.

       Parameters:
           UPLO

                     UPLO is CHARACTER*1
                     Specifies the part of the matrix A to be set.
                     = 'U':      Upper triangular part is set; the strictly lower
                                 triangular part of A is not changed.
                     = 'L':      Lower triangular part is set; the strictly upper
                                 triangular part of A is not changed.
                     Otherwise:  All of the matrix A is set.

           M

                     M is INTEGER
                     The number of rows of the matrix A.  M >= 0.

           N

                     N is INTEGER
                     The number of columns of the matrix A.  N >= 0.

           ALPHA

                     ALPHA is DOUBLE PRECISION
                     The constant to which the offdiagonal elements are to be set.

           BETA

                     BETA is DOUBLE PRECISION
                     The constant to which the diagonal elements are to be set.

           A

                     A is DOUBLE PRECISION array, dimension (LDA,N)
                     On exit, the leading m-by-n submatrix of A is set as follows:

                     if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n,
                     if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n,
                     otherwise,     A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j,

                     and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n).

           LDA

                     LDA is INTEGER
                     The leading dimension of the array A.  LDA >= max(1,M).

       Author:
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Date:
           September 2012

       Definition at line 111 of file dlaset.f.

Author

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